Hydraulic band-stripping machine.



No. 819,871. PATBNTED MAY 8, 1906. W. EVANS.

HYDRAULIC BAND STRIPPING MACHINE. APPLICATION FILED SEPT. 25, 1905.

6 SHEETS-SHEET 1,

IV I TN ESSES I N V EN TOR min-W mauzw a mum co. Pnomumucuvnws. msmncrau. n c.

No. 819,871. PATENTED MAY 8, 1906. W. EVANS.

HYDRAULIC BAND STRIPPING MACHINE.

APPLIOATION FILED SEPT. 25. 1905.

6 SHEETS-BHEET 2.

WITNESSES I INVENTOQR W Zfk No. 819,871. PATENTED MAY 8, 1906. W. EVANS.

HYDRAULIC BAND STRIPPING MACHINE.

APPLICATION FILED SEPT. 25. 1905.

6 SHEETS-SHBET 3,

IITi INVENTOR WITNESSES ANOREW. mum! am more-umocmuens. wAsmua'mn, a c.

PATENTED MAY 8, 1906.

W. EVANS. 4 HYDRAULIC BAND STRIPPING MACHINE.

APPLICATION FILED SEPT. 25. 1905.

6 SHEETS-SHEET 4,

INVENTOR WITNESSES:

munzw. I1 aanwm c0. IHOYO-UTNOGRAVNERS wnwmimn. a. c.

- No. 819,871. PATENTED MAY 8, 1906.

W. EVANS.

HYDRAULIC BAND STRIPPING MACHINE. APPLICATION FILED SEPT. 25. 1905.

' WITNESSES.-

6 SHEETS-SHEET 5,

No. 819,871. PATENTED MAY 8, 1906. W. EVANS.

HYDRAULIC BAND STRIPPING MACHINE.

APPLICATION FILED sIiPT. 25. 1905.

6 S EETS-SHEET 6,

INVENTOR WITNESSES lmnnewv a. mum m. momumocmwsns. wAsnmcwN. n. a

UNITED STATE? P TENT OFFICE.

l VILLIAM EVANS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO XVILLIAM EVANS, ROBERT EVANS, AND JOHN H. EVANS, OF PHILA- DELPHIA, PENNSYLVANIA, A FIRM.

Specification of Letters Patent.

Patented May 8, 1906.

Application filed September 25. 1905. Serial No. 279.946.

chnes, of which the follow .ng is a specification.

My invention has relation to a hydraulc machine for strppng the bands of elliptical springs, especially such as are used on ra l road-car trucks, and in such connection it relates to the constructive arrangement of means controlled by hydraulic pressure to remove bands from sprngs of various sizes and forms.

The principal objects of my invention are, first, to prov,de a machine with means controlled by hydraulic pressure to clamp and remove bands from sprngs; second, to provide clamping as well as bandstrlppng means, with movable heads adapted to engage with their entire surface the spring and its band irrespective of the position the same occupies in the machine; th rd, to arrange certain of the clamping means removable and adjustable with respect to their dameter to permit of the ready inserton and clamping of springs of varying sizes; fourth, to provide the machne wIth means to limit the distance of insertion of the springs into the machine; and, fifth, to provide the band-stripping means w th mechanism to automatically return the same to a normally inoperative position.

The nature and scope of my invention will be more fully understood from the following description, taken in connection with the accompanying drawings, forming part hereof, in which Figure 1 is a View illustrat'ng in side elevation the hydraulic band-stripping machine, the manner of clamp'ng the springs and holding the same in posltlon during the str'pping operation, the means for automat cally returning the stripping means to the'r normally inoperative post on, and means controlling the hydraulic mechan'sm actuating the clamping and stripping means, all embodying main features of my said invention. Fig. 2 is a top or plan View thereof. Fig. 3 is a horizontal sectional view of the machine, certain of the clamping means being removed therefrom. Figs. 4 and 5 are detal views enlarged, illustrat ng, respect vely, in top or plan view and in sde elevat'on a port-on of the stripping means and a movable head carried by the same. Fig. 6 is a vew, partially in vertical sect'on and part ally in side elevation, of the left-hand end of the machine, illustrating the spring in a clamped pos ton therein. Fig. 7 is a view, partly in. horizontal section and partly in top or plan view, of a portion of the machine shown in Fig. 6, the spring and certain of the clamping means being removed therefrom. Fig. 8 is a crosssectional view of the left-hand end of the machine, taken in a direction toward the righthand end thereof. Fig. 9 is a view illustrating in elevat'on the left-hand end of the machine. Fig. 10 is a cross-sectional vow of the left-hand end of the machine, taken in a direct on toward the same; and Fig. 11 is a view illustrat'ng in elevatIon the right-hand end of the machine.

Referring to the drawings, A represents the frame of the machine, preferably consisting of sections a and a, which by means of bolts a and nuts a are connected with each other, as shown in Figs. 1, 6, 7, 9, and 11. This division of the frame A permits of the ready insertion of a hydraulic cylinder 6 between the sections a and a thereof, which cylinder by means of flanges b, resting upon the projection a, formed integral with the sections a and a, is supported by the same and is securely held in position on the projection a and within the frame A by bolts a, passing through the sections a and a and engaging the projections b in the manner shown in Figs. 7 and 10. The piston of the hydraulic cylinder 6 is provided with an extension 6 preferably oblong in cross-section, which terminates in a rounded portion b. The extension 6 serves as a support for a head 0, provided with a depression 0 at its under side, which .is adapted to receive the rounded portion 6 of the piston extension b and to form in conjunction therewith a knuckle-joint upon which the head 0 is evenly balanced and is permitted to assume various angular positions with respect to the piston N, for a purpose to be presently more fully describeda The head 0 is preferably pro-' vided with downwardly-projecting sides c terminating in bearing portions 0 and with strengthening-ribs c", as shown in Figs. 6, 8, and 10. The ribs 0 by abutting against the projection a limit the downward movement of the piston b and head 0, and the preferably rounded bearing portions 0 are adapted to be brought into engagement with and to raise cross-beams d, having a range of movement in depressions 0 formed in the sections a and a, of the frame A, as shown in Figs. 3 and 7' of the drawings. These cross-beams d serve as a support for a spring B, from which the band C is to be removed. The spring B, introduced into the standard A and between the extension at and a of the sections a and a by means not shown, is placed upon the cross-beams d. In order to limit the introduction of the spring B in the machine, a cross-beam e, preferably engaging openings a, arranged in the extensions a and (1 of the sections a and a, is provided with a spindle 6, having a hand-wheel e ,,which by extending into the path of the spring B and by engaging -a plate B thereof, is adapted to arrest the inward movement of the spring B when the band C thereof is brought into a substantially central position with respect to openings 0., arranged in the extensions a and a and to the hydraulic piston 6 Before, however, the spring B is introduced into the frame A of the machine a cross beam f, preferably formed of sections f, has been removed from the frame A by sliding the same out of engagement with openings a arranged in the extensions (1 and a In order to facilitate the withdrawal of the cross-beam f, the frame A is provided with a bracket g, which serves as a support for the beam f, during its partial disengagement from the standard A, as will be readily understood in conjunction with Figs'. 1, 3, and 9 of the drawings. After the spring B has assumed its proper position on the beams d, the projecting end of the spindle e is withdrawn from the cross-beam e, and the cross-beam f is reinserted in the openings a of the frame A. i/Vater under pressure is now introduced in the cylinder?) by means of a pipe b connected with a valve 6, actuated by a handle I), which valve I) communicates with a chamber of a receptacle b and by means of a pipe I) is connected with any suitable source of water'- supply held under pressure. (Not shown.)

As shown in Figs. 1, 8*, and 9, the receptacle b is preferably formed integral with a bracket b which is removably secured to the frame A. As soon as the water under pressure enters the cylinder b the piston b thereof and head 0 carried by the same is raised and the latter brought with its bearingsurfaces 0 into engagement with the cross-beams d, thus raising the same and the spring- B,

resting thereon, as well as the sectional crossby the head 0 and piston b until released therefrom by the actuation of the valve 1)". When the spring B assumes an oblique position in the frame A by being brought into engagement with the beams e'and f, which positlon is due to the particular shape of the spring or to the removal of a portion of the blades B thereof through breakage, the head a of the piston extension b by swinging on its fulcral point b will adapt itself to the oblique position of the spring B, and thus hold the same securely clamped by equally distributing the pressure exerted by the piston b on the head 0 to the beams 61 and by the same and spring B to the beams e and By extending the spindle c more or less into the frame A springs of various diameters and sizes may be securely prevented from being too far inserted into the frame A, and atthe same time springs B may be placed therein, which require beams of less diameter than the beam f shown, which diameter in the present instance may be reduced by removing one or more of the sections f constituting the beam f. The band C of the spring B is now held in a position in which the same can be removed therefrom, and the preferred mechanism employed to accomplish this result is as follows:

As shown in Figs. 1 and 11, to the sections a and a of the frame A by means of bolts h, passing through a flange 7L2, is removably secured a hydraulic cylinder h. At its upper end the cylinder h by means of rods h and nuts h, engaging the threaded ends thereof, is securely connected to the extensions a and (L10 of the sections a and a by conducting the rods through sleeves a", formed integral with the extensions a and a and through the flange 7L2 of the cylinder h. The piston 72? of, the cylinder h is provided with an extension h, to which in the present instance are bolted pusher-arms i and i, partially surrounding the spring B and terminating a certain distance from the band C thereof. As shown in Figs. 4 and 5, each of the pusher-arms i and i is provided with a head 0?, having a trunnion a? loosely engaging depressions arranged in the arms i and i. The piston k by means of a gland h is rendered water-tight in the cylinder h, and when water under pressure is introduced into the same the piston k and its arms 'Z and i are moved toward the spring B, and by this movement the heads i are brought into engagement with the band C by forcing the same forward, and thus stripping the band from the spring B. If by this forward movement the band C is not completely removed from the spring B, the same is lowered and again slightly shifted forward toward the cylinder h and then reclamped, which forward movement may again be limited by the spindle e of the crossbeam 6. After the spring B is again locked in its shifted position, the band C is now completely removed from the same by the pusherarms i and i. In the same manner as hereinbefore described, in conjunction with the head 0, the heads 1' of the pusher-arms i and i will adjust themselves to any angular posi' tion the band C may occupy with respect to the arms i and i, and thus the force transmitted to the heads i by the arms and piston h" will be evenly distributed over the surface of the band C, engaged by the heads i The water under pressure is introduced into the cylinder h by a pipe Zc, connected with a receptacle b, which by means of a pipe I) is connected with a suitable source of watersupply. (Not shown.) The housing 6 of the slide-valve Z1 actuated .by a handle b and controlling the entrance of water into the cylinder h, is bolted in the same manner as the valve b to the receptacle 1) and is thus removably connected therewith. V As soon as by the proper operation of the valve 1) the water is permitted to leave the cylinder h spring-controlled rods Z, engaging extensions 01 of the pusher-arms i and t" and passing through eyes h, formed integral with the flange h of the cylinder h, shift the piston h backward into the normal inoperative position shown in Fig. 3. The springs Z, actuating the rods Z, bear with one end against the eyes h of the cylinder h and with their other end against a nut Z secured thereto, and are thus contracted during the forward movement of the piston and arms i and i. After the band C is removed from the spring B the arms & and i automatically return to their normal inoperative position, the beams d, head 0, and piston b are lowered, and the spring B thus released is now permitted to be removed from the machine, for which purpose the beam f is preferably withdrawn from the frame A.

Having thus described the nature and object of my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a machine of the character described, a frame, two sets of beams arranged in said frame and adapted to receive and support the spring, a hydraulic cylinder having a piston adapted to actuate certain of said beams to permit of the clamping of the spring to said frame, a second hydraulic cylinder having a piston, and means carried by thesame, when actuated to engage and remove the band from the spring.

2. In a machine of the character described, a frame, hydraulic cylinders arranged at right angles with respect to each other, carried by said frame, pistons arranged in and actuated by said cylinders having extensions, heads pivotallysupported bysaid extensions, beams adapted to receive and clamp a spring introduced between the same to said frame when actuated by one of said heads carried by the piston and its extension occupying a vertical position, and said second head carried by the piston and extension occupying a horizontal position adapted to remove the band from the spring when clamped in said beams.

3. In a machine of the character described, a frame, hydraulic cylinders arranged at right angles with respect to each other, carried by said frame, pistons arranged in and actuated by said cylinders having extensions, heads pivotally supported by said extensions, beams supported respectively by one of said heads and frame adapted to receive and clamp a spring introduced between the same to said frame when actuated by one of said heads carried by the piston and its extension occupying a vertical position, and said second heads carried by the piston and extension and occupying a horizontal position adapted to remove the band from the spring, when clamped in said beams.

4. In a machine of the character described, a frame, beams arranged transversely and the upper ones carried by said frame, said beams adapted to engage a spring introduced between the same, a hydraulic cylinder arranged in a vertical plane below said beams having a piston, a pivotal head carried by said piston and adapted when actuated by the same to raise certain of said beams and clamp the spring between the same and to said frame, a cylinder arranged in a horizontal plane having a piston, arms carried by the piston of said horizontal cylinder each having a head adapted to directly engage and remove the band from the spring when actuated by the arms and piston of said horizontal cylinder.

5. In a machine of the character described, a frame, two sets of beams arranged transversely in said frame, whereof the upper set is carried by the same, said beams adapted to engage a spring introduced between the same, means carried by one of said beams and adapted to limit the movement of the spring into said frame between said beams, a hydraulic cylinder arranged in a vertical plane below said beams having a piston, a pivotal head carried by said piston and adapted when actuated by the same, to raise certain of said beams and clamp the spring between the same and to said frame, a cylinder arranged in a horizontal plane having a piston, arms carried by the piston of said horizontal cylinder, each having a head adapted to directly engage and remove the band from the spring when actuated by the arms and piston of said horizontal cylinder.

6. In a machine of the character described, a frame, a hydraulic cylinder having a piston arranged in said frame, two sets of beams arranged in said frame, one set movably supported by said cylinder-piston and the other set carried by said frame, the lower set of beams, when actuated by said cylinder-piston, adapted to force a spring introduced between the same against the upper set of beams to clamp the spring to said frame by engaging one or more of the upper plates of the spring, a second hydrauliccylinder hav; ing a piston, arms connected therewith, and said arms arranged, when, actuated by said piston to engage and remove the band from said spring.

7. In a machine-of the character'described, a frame, a hydraulic cylinder carried by said frame and having a piston, a head carried by said piston, beams carried by said frame, beams carried by said head and movably arranged in said frame for supporting and forcing a spring placed thereon against said firstmentioned beams and by the same and said head to clamp the spring to said frame, a second cylinder carried by said frame having a piston, arms rigidly secured thereto, heads pivotally secured to said arms, said heads arranged when the arms are actuated by the piston of said second cylinder to force the band from the spring by engaging the same at two points. V

In testimony whereof I have hereunto set my signature in the presence of two subscribing witnesses.

l/VILLIAM EVANS. Witnesses:

WILHELM VOGT, THOMAS M. SMITH. 

